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Expression of heme oxygenase-1 protein and messenger RNA in permanent cerebral ischemia in rats.

Authors: Fu, R  Zhao, ZQ  Zhao, HY  Zhao, JS  Zhu, XL 
Citation: Fu R, etal., Neurol Res. 2006 Jan;28(1):38-45.
Pubmed: (View Article at PubMed) PMID:16464361
DOI: Full-text: DOI:10.1179/016164106X91852

BACKGROUND: Carbon monoxide has been regarded as a gaseous molecular messenger like nitric oxide. PURPOSE: To clarify the role of heme oxygenase-1 in the permanent cerebral ischemia at the protein and mRNA level. METHODS: The expression of heme oxygenase-1 protein and messenger RNA was investigated at different time points following MCAO using immunohistochemistry, Western blotting, RT-PCR, and Northern blotting.RESULTS: Increased HO 1immunoreactivity was detected in hippocampal and cortical neurons after 1 hour of ischemia, and was also observed in astroglial cells. After 12 hours of ischemia, HO-1 was found in both neurons and glia in cerebral cortex and thalamus, and in striatal glia cells. Western blotting analysis show the expression of HO-1 protein in cortical neurons reached the peak after 12 hours of occlusion and decreased gradually, but was still detected at day 7 post-occlusion. The expression of messenger RNA was examined in the brains of rats subjected to permanent cerebral ischemia by semi-quantitative RT-PCR and Northern blotting. HO-1 mRNA transcription could be detected 1 hour after occlusion. After 1 to 6 hours of occlusion, the expression of HO-1 rose rapidly, reaching a peak at 12 hours post-occlusion, decreased gradually, and lasted until day 7 of occlusion. Although HO activity of cerebral tissue can be detected in both sham-operated group and operated groups, the HO activity in operated groups is much stronger than that in sham-operated group. CONCLUSIONS: The induction of HO-1 protein may protect cerebral tissues from ischemic damage.


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RGD Object Information
RGD ID: 1582709
Created: 2006-11-18
Species: All species
Last Modified: 2006-11-18
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.